A search query parameter is a segment of a search query URL which appears on a separate results page after a question mark (eg. `search.html?addsearch=keyword`). By default, ‘addsearch’ is used as the parameter in search query URLs.
If you are using the Separate Result Page and would like to change the search query parameter, you can disable this setting and use your own custom parameter via the Other Settings section of your AddSearch dashboard.
At the bottom of the Other settings section of your AddSearch dashboard, you can find the Search query parameter button.